Shock-absorber.



F. SGHIMMBL.

SHOCK ABSORBER.

APPLICATION FILED JA1L29, 1912,

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UNITED STATES PATENT orruon.

FRIDOLIN SCHIMMEIQ, F FARIBAULT, MINNESGTA, ASSIGNOB T0 SCHIMMEL, REID 6c COMPANY, OF FARIBAUL'I, MINNESOTA, A CORPORATION OF MINNESOTA.

SHOCK-ABSORBER.

Specification of Letters Patent.

. Patented Dec. 31,1912.

Application filed January 29, 1912. Serial No. 674,016;

To all whom it may concern, Be 1t known that I, FRmoLIN SOHIMMEL,

a a citizen of the United States, residing at- Faribault, in the county of Rice and State of Minnesota, have'invented certain ,new and useful Improvements in Shock-Absorbers"; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same. I

Mypresent invention has for its object to provide a simple and highly etficient shock absorber, especially adapted for use in connection with automobiles, and to such ends, generally stated, the invention consists of the novel devices and combinations of devlces heremafter described'and defined in the claims. 7

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a view in side elevation showing the shock absorber connected to the upper and lower a members of an elliptical spring some parts provided withrigidly clamped laterally offbeing broken away; Fig. 2 is a transverse section taken on the line w w? on Fig. 1; Fig. 3 is a transverse section taken on the line 00 m on Fig. 1; and Fig. 4 is a detail view in section showing certain of the parts of the shock absorber,- portions being broken away.

This improved shock absorber may be,

applied in various diilerentmways, between spring connected parts or members, but for the purpose of illustration, it is sho'wnas directly connected between the upper and lower members 1 of an' ordinary elliptical,

or double elliptical spring, the said spring member, for 'such purpose, being shown as set lugs 2. a

The shock absorber comprises a friction hub preferably in the form. of a ring 3 having a projecting arm 4 and conical friction surfaces 5 that. flare outwardly in" reverse directions. Otherwise stated, the internal friction surface of the hub 3 1s approxl mately V-shaped in transverse cross section.

Thereversely flaring conical friction .sur-

faces 5 areengaged by friction dis'ksli formed with corneal surfaces that closel} engage the said conical friction surfaces 5...

The inner faces of the friction-disks 6 are spaced apart so as to afford a chamber 7 for containing a lubricant such as hard oil, and which lubricant is delivered into the sa d chamber through a hollow neck or nipple 8 shown as formed integral with and prO ected upward from the'hub 3. An inverted oil cup 9 has-screw-threaded engagement with the upper end of the-neckv 8 and 1s adjustable thereon, so asto force downward the hard oil contained therein, through the neck 8 and into the oil chamber 7. The arm 4 of the hub 3 constitutes one arm of a toggle, and the otherarm of.

said toggle is afiorded bya pair of laterally spaced metal strips or bars 10, preferably constructed from spring tempered steel. At one end, the laterally spaced members of the arms 10 embrace the hub 3 and friction disks 6 and are connected to the said disks by a nut equlpped bolt 11 passedthrough and axially through the said disks. At its free end, the arm 4 is pivotally connected at 12 to one of the lugs 2, and the divided, or

two part spring arm 10, at-its free end, is provided wit-h aspacing thimble 13-that is pivotally connected to the other lug 2 at 14. As already indicated, the toggle arms 4 and 10 instead of being-indirectly,-'connected. to the frictional body and to a relatively fixed part of the running gear, indirectly through the upper and lower portionsof the spring 1, might be directly and independentlycom nected to the 'saidy'relatively movable spring connected parts. 1 I

To cause the friction disks 6 to move *piv-- otally with the two-part arm 1( they are shown as provided with laterally rojecting V lugs 15 between which the latera 1y spaced members of said arms 10 press the friction disk into frictional'engagement with-the revcrsely flaring conical friction surfaces 5 of the hub 3, and preferably, they bear'directly against diametricallyextended bosses or ridges 16 formed on the outer faces, of the said disks. A nut-equippedbolt 17 is passed through the intermediate portion's of 'the spring members of the .arms 10, preferably; at a point quite close to the hub 3, By .tightening the nut of the bolt 17, the frictional engagement or press'ure between the disks (5 and hub (S-may be increased, at will,

and conversely, the intensity 'of such frictional engagement may be decreased by loosening the nut on the 'bolt The ab'ovej noted frictional engagement may also be varied by tightening or looseningof the nut 011 the bolt 11. The said bolt 11 is not necessary for this purpose, but is provided chiefly as a simple and efficient pivotal device for holding the members of the spring arms 10 properly coupledvto'the friction "disks 6.-' The best results are obtained by theuse of boltsvl7 for the above noted adjustment, because it acts yieldingly through the spring members of the said arms 10.

' This'yielding action may,-however, be also obtained, to a limited extent, by the use of a split spring washer 18 between-the nut of the bolt 11 and the adjacent side'or member of the spring. arms 10.

In a shock absorber of the above character, it is desirable to obtain increased frictional resistance whenever the toggle arms a and 10 are given extreme movements by very intense shocks; and this I accomplish in a very simple and eficient way by providing the hub 3 with auxiliary friction surfaces formed on projecting lugs 19, and providing the disks 6 with coiiperating auxiliary friction surfaces formed on projecting 'friction' lugs 20. The friction surfaces of the said friction lugs 19and 20 lie in the extended conical friction surfaces of the hub- 3 and .disks 6, and the lugs 20 are so spaced that they will be engaged with the cooperath in-g lugs 19 only when the arms 4 and 10 3 are given extreme movements either toward or from each other. Furthermore, the lugs 20 are preferably increased in length indirections circumferentially away from the cooperating lugs 19, so that when the said lugs are engaged With the lugs 19, the fricftional resistance will be increased .in pro- 40' portion to the-amount of extreme movement given to the toggle arms 4: and 10 either toward or from each other.

\Vhat I claim is: a

1. A shock absorber comprising a pair of 4 arms connected to act as a toggle, one of said arms having a hub with reversely flaring conical friction. surfaces, and the other of said arms having connected for movements therewith, elements with reversely flaring conical friction surfaces engaging the re verse conical surfaces of said hub, said frictionally engaging members having auxiliary friction surfaces arranged to be engaged with increasing pressure by extreme movements of the said arms 2. A shock absorber comprising a pair of arms connected to act as a toggle, one of said arms having a hub with reversely flaring and the other of f! laterally spaced tional contact between said disks andhub through a positive but yielding pressure.

3. A shock absorber comprising a pair of arms'connected to act as a toggle, one of the said arms having a hub with friction surfaces,.and the other of said arms being made up of laterally spaced bars embracing said hub, friction disks connected to osci late with said two-part arm-and engaging the friction surfaces of said hub, and means applied to the intermediate portions of the bars of said divided-armsfor drawing the s me together to thereby yieldingly vary the intensityof the frictional engagement between said hub and disks, the said hub and disks having auxiliary friction surfaces arranged tobe engaged only by extreme movements of the. said arms in respect to each other.

In testimony whereof I afiix my signature in presence oftwo witnesses.

rninonin soHiM 'EL. Witnesses: I i

J. W. Crone, ROBERT MU. 

